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Letters Patent No. 74,262, dated February 11, 1,868.

IMPRGVED BEDSTEAD'SLAT.

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TO ALL WHOM IT' MAY GONCERN:

Be it known that I, OTIS H. WEED, of Charlestown, in the county of Middlesex, and State of Massachusetts, have invented certain Improvements in Bedsteed-Slats, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification, in which- Figure 1 is a perspective view of a bedstead-slat, having my improvement applied to the under side thereof.

.Figure 2 is a vertical section through the centre of the same.

Figure 8 represents the position of the parts when the slutis bent down at the centre..

-Figure 4is a side ,elevation of thespring which I'apply to the under side 'of the slet.

Bedstud-slats have been provided on their under surfaces with long wire springs, coiled, and secured at each end tothe slot, and so arranged as to support it at the centre, for the' purpose of preventing'it from becoming permanently bent down by continued use, as described in .the patent of N. J. Willis for bed-bottom, dated January 22, 1867. Two wire springs have also been applied to a. slat, one end only of euch spring being secured thereto, the opposite end sliding beneath a. staple or guide. These springs, however, being made of wire, do not possess the necessary degree lof strength and elasticity to eect the desired object, and are also liable to become set by the bending of the slat, thus rendering them useless.' MyV invention has for its object to overcome these diculties, and consists in the application, to the under side ofva bedstead-slat, of a spring of dat tempered steel, secured permanently thereto, the spring being so formed and arranged that it will bear against the central portion ofthe slet, thus 'acting as a lifter to retain it in its original form, and etfectually preventing it from becomingpermanently bent down at the centre. i

i To enableothers skilled in the art to understand and uso my invention, I will proceed to describe the manner in which I have carried it out. l i

\ In the said drawings, A represents a woodenbedstead-slat, to the under surface of which is secured a spring, B, of ilatitempered steel. -This spring, which is made in the form represented in iig. 4, is permanently secured, at each end, to the-slet A, by meaps of screws or rivets a; and, when secured in place, its central curved portion, will exert a pressure on the centre of the slet sufoient to retain-it in its original curved form, and prevent it from sagging and becoming permanently bent down at the centre from. constant use, as is frequently the case where wire springs are employed.

A spring constructed as above described, of dat tempered steel, possesses a great degree of streng-th and elastictyLandris not liable to become set, .thus presenting great advantages overa spring made of wire, and particularly adapting it lfor the purpose to which it is applied, while hy its use I am enabled to employ very light slats, the spring serving to stitfen the slat at the centre; and, if the latter is bent downby any unusual weight, as seen in hg, 3, the spring will bc drawn out, so as to conform stall points to the curvature of the slut when (being secured at each end at a) it acts as a strap or brace to prevent the slat from breaking or being bent down too far.

' O'laz'm. What I claim as my invention, and desire to secure by Letters Patent, is- Tho combination of the spring B, of tlat tempered steel, with the slat rA,"when the spring is constructed with a double curvature, the centre resting against the slat, as shown, and arranged so as to operate substantially as and for the purpose described.

l o'rIs H. WEED. Witnesses i?. E.l Trsonnmonnn, N. W. SrnAnNs. 

